Loki is a really damaged soul. On the one hand, there is his emotional volatility. He’s neither Asgardian nor Frost Giant – and he is entirely alone, and that makes for a very sad spirit. On the other hand he’s someone who overtly delights in the chaos he creates. He’s an agent of mischief. There are two roads that I have to go down in my journey to play him: one is to excavate the depths of his spiritual pain, and the other is to try and find a place within myself that enjoys wreaking havoc.
Tom Hiddleston

Underneath the steely cold veneer of his trickster charm is a certain vulnerability and sensitivity – the wounded fragility of an outcast brother and son. His mind IS a box of cats though! But I love him.
Tom Hiddleston ( about Loki )

He is a combination of mercurial intellectual ability, emotional ambiguity, rakish charm, charisma and provocative wit. He has a wicked inclination to mischief, underneath which is a well of spiritual pain. Both these aspects are central to his depth as a character: his unashamed and perverse delight in creating chaos; and his capacity for raw emotional expression […] And – as my American friends tell me – he’s kind of a badass! He’s one of the richest, most rewarding, most fun characters I’ve ever played.
Tom Hiddleston ( about Loki )